Tusi words in the Al-Abniya an haqayeq al-adviya

The Al-Abniya an haqayeq al-adviya authored by Abu Mansur Movaffaq b. Ali Heravi¡ is the oldest extant Persian book on pharmacology. One of its copies dated 447 A.H. and scribed by Asadi of Tus¡ is the oldest manuscript available and the first complete dated text ever in Persian. Abu Mansur wrote this book in Heravi dialect and Asadi transcribed it in Tusi dialect. By examining this book¡ we realize that the words in it and their pronunciations have remained still alive in the Khorasani dialects¡ and this is attested to by the fact that the manuscript is transcribed with diacritical marks.
The present study has explored a number of words from the Al-Abniya¡ in Tusi dialect which has continued to stay in its only living continuation- namely¡ the Mashhad dialect; instances of their uses in other dialects of the greater Khorasan have also been presented.